Inflatable Bag Pneumoperitoneum Device for Tissue Isolation
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Solution Overview
Problem
Current laparoscopic surgical procedures face challenges in effectively isolating and extracting tissue without dispersing cancerous cells or fluids within the peritoneal cavity, as existing methods lack a reliable mechanism for containing and retracting tissue during surgical procedures.
Innovation Solution
An artificial pneumoperitoneum device, comprising an inflatable bag with a cuff and biasing element, is introduced to create an artificial pneumoperitoneum, allowing for tissue isolation and extraction by inflating the bag within the abdominal cavity, which maintains containment and retracts surrounding structures, preventing the dissemination of tissue and fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inflatable bag is introduced to create artificial pneumoperitoneum for tissue isolation, then tissue containment and surgical safety are improved, but device complexity and difficulty of insertion increase
Solution Approach 1:
The inflatable bag is nested within a delivery catheter that guides it through the abdominal wall. The bag is folded or compressed inside the catheter during insertion, then expanded once positioned in the peritoneal cavity. This nesting approach simplifies insertion while maintaining the tissue containment function.
Solution Approach 2:
The device is segmented into distinct components: a delivery catheter for insertion, an inflatable bag for containment, and a cuff for securing. This segmentation allows each component to be optimized independently and simplifies the overall insertion process by separating the delivery mechanism from the functional element.
2Stability of the object's composition
If a stiff cuff is used to maintain bag opening, then bag stability and tissue isolation are improved, but ease of insertion through incision decreases
Solution Approach 1:
The cuff transitions from a compressed, flexible state during insertion to an expanded, stable state after deployment. This dynamic transformation allows the cuff to be easily inserted through the incision while maintaining bag stability once positioned. The cuff may be inflated or mechanically expanded after the bag is in place.
Solution Approach 2:
The cuff is designed with localized stiffness or rigidity only at the portion that contacts the abdominal wall, while the rest of the bag remains flexible for inflation and tissue accommodation. This local quality differentiation provides stability where needed without compromising ease of insertion.
3Area of stationary object
If the bag is inflated to create working space, then surgical visibility and access are improved, but risk of tissue damage from pressure increases
Solution Approach 1:
The inflation pressure and volume of the bag are carefully controlled and adjusted based on patient anatomy and surgical requirements. The pressure parameters are optimized to provide adequate working space while remaining below thresholds that could cause tissue damage. Real-time monitoring and adjustment of pressure parameters mitigate the risk of harmful effects.
Solution Approach 2:
The inflatable bag acts as an intermediary between the surgical instruments and the surrounding tissues. It provides a controlled interface that creates working space while distributing pressure evenly, preventing direct contact between instruments and tissues that could be damaged by excessive force or pressure.
4Length of moving object
If the cuff is made longer to improve tissue retraction, then surgical access is improved, but device complexity and insertion difficulty increase
Solution Approach 1:
The longer cuff is folded or compressed within the delivery catheter in a nested configuration, allowing it to be inserted through a standard-sized incision. Once deployed, the cuff extends its full length to provide improved tissue retraction. The nesting eliminates the need for a larger incision despite the increased cuff length.
Solution Approach 2:
The cuff may be segmented into multiple sections or segments that can be independently positioned or adjusted. This segmentation allows the long cuff to be managed more easily during insertion while maintaining its full length for effective tissue retraction. Each segment can be secured separately to the abdominal wall.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively isolates and removes tissue while preventing the release of potentially harmful cells into the peritoneal cavity, providing a safe and controlled environment for surgical procedures by maintaining pneumoperitoneum and retracting structures, thus enhancing surgical safety and efficacy.
Implementation Method 1
The loop may be of a shape memory material such as Nitinol
Implementation Method 2
The biasing element (e.g., ring) is preferably flexible to facilitate entry through an incision and/or an instrument access port
Implementation Method 3
An artificial pneumoperitoneum device, comprising an inflatable bag with a cuff and biasing element, is introduced to create an artificial pneumoperitoneum, allowing for tissue isolation and extraction by inflating the bag within the abdominal cavity
Data Source
AI summary
A method for performing a laparoscopic procedure may include inserting a bag through an opening. The method may also include delivering tissue into the bag, sealing the bag, and inflating the bag to create an artificial pneumoperitoneum that extends the abdomen and provides additional working and viewing space. Further, the method may include carrying out a procedure on the tissue located in the inflated bag.